Safety fuse



Feb. 12 1924. 1,483,692

H. a. STONEMAN S AFETY FUS E Filed May 22 1922 wjfilwzewzaai INVENTOR.

""""' "14 TJFORNEY.

Patented Feb 12, 1924.

UNITED STATES KOVEY B. STONEMAN, OF COUNCIL, IDAHO.

SAFETY FUSE.

Application filed May 22,

T all whom it may concern:

Be it known that I, HOVEY B. STONnMAN, a citizen of the United States, residing at Council, in the county of Adams and State of Idaho, have invented certain new and useful Improvements in Safety Fuses, of which the following is a specification,

The invention appertains to certain mprovements in safety fuses for protectuwelectrical circuits and devices generally, ant has foritsprimary object to provide for one of a type adapted to bc substituted for the usual taps or binding nuts on the terminals of a vacuum tube socket commonly employed in a wireless systemand to otherwise of itself constitute the terminal for the attaching thereto of the current conductors leading to and from the socket.

\Vith the foregoing and equally important objects in view the invention resides in the certain novel. and useful construction and arrangement as will he hereinafter more fully desorihed,set forth in the appended claims and illustrated in the accompanying drawings, in which 2 Figure 1 is-an enlarged perspective view of the conventional form of a socket for the reception of a vacuum tuhe and of a preferred embodiment of the device as applied thereto,

Figure 2 is an elevation of the improved safety fuse,

l igure3isavertical section taken diametrically through the same, and

Fi ure 4 is a horizontal section taken on the line 4.-4 of Figure 3.

Referring to the drawings, the preferred embodiment of the invention as shown therein comprises a tubular body 10, of an insulating material such as glass or the like, having circular metal discs or plugs 11 and 12 fitted into the opposite lower and upper. ends of the bore thereof, and set within the same flush with the end edges. These discs or plugs 11 and 12 are spaced apart as at 13 medially of the bore of the body at a distance suitable to prevent any and all possibility of an electric current arcing therehetween.

coextensive with the bore of the body is a strip of fusible metal 14 which is arranged to abut the wall of the bore of the body 10 and is held in such position by hav ing its opposite end portions arranged or wedged between the wall of the bore and the peripheral edges of discs or plugs 11.

1922. Serial No. 562,724.

and 12. The upper and lower discs or plu s 12 and 11 are formed to provide central y disposed and alined bores which are suitably screw threaded, the bore of the lower disc or plug 11 for the engagement on a usual terminal screw (not shown) secured in the terminal extensions or ears a of the form of the electric socket fitting b, and the bore of the upper disc or plug 12 for the engagement therein ofa binding screw 15 for the attaching thereto of a circuit conductor a.

As shown in Figure 1 of the drawings,

each of the several terminal extensions or ears :1 of the socket b will have one of thefuse terminals applied thereto, and for the purpose, the threaded shanks of the usual binding screws {not shown) of these extensions or ears 0. will be threaded upwardly thereof whereby the cores of the lower discs or plugs 11 of the fuse terminals will be engaged thereon after the manner of a nut or tap, when the circuit conductors a will have their free ends bared for clamped engagement under the heads of the binding screws threaded downwardly of the upper discs or plugs 12 of the fuse terminals. It is to be noted that these fuses may be made for any desired current carrying capacity, such as for 1}; i; 1; 1}; 14;; 2 or more amperes.

From the foregoing, it will be readily apparent that, while a preferred -f'embodiment of the fuse terminal has been described and illustrated heiein in specific terms and details of construction, arrangement and application, various changes and modifies tions of the same may be resorted to without departing from the sprit of the Invention, or the scope of the claims appended hereunto.

Having thus fully described the inventiou. what is claimed is:---

1. A terminal fuse comprising a tubular body of an insulating material a fusible conductor strip coextcn Eve with and positioned throughout 1 the wall of the horn of said body, for losing: the opp u and having edge wit the opposite muls of said fu ihlr {3. means engaging within the rontlluftli'c tumo at one end of said body for uttachi s the usual terminal of an elm and means eutgagzz t. .7 s, other end of aid body for the attaching: ot' a circuit conductor.

2. A terminal fuse comprising a tubular i said body body of an insulating material, a fusible conductor stri coextensive with and ositioned throng out against the wall 0 the bore of said body, spaced metal plugs at and within the opposite ends of bore of said body and having edge contact with the opposite ends of said fusible strip, the lower of said plugs having a threadedbore formed centrally, adapted to engage over the usual terminal screw of an electric socket, and a binding screw threaded inwardly of the upper of said plugs and adapted to clamp thereunder the bared end of a circuit conductor.

3, A terminal fuse comprisin a hollow cJ lindrical body of insulation, a usible condhctor strip extending lengthwise of said bqdy, and a conductive pin 1 positioned with in said body at each and t ercof and spaced from each other, said plugs engaging the ends of said strip for clamping it a ainst the inner face of said body, one 0 said plu s having'means for connectin therewit the terminal of an electric soc st, and the other of said plug havin means for connecting therewith means 0r clamping thereunder the bared end of a circuit conductor.

4. A terminal fuse comprisin a hollow c lindrical body of insulation, a usible concuctor strip extending lengthwise of said" body, and a conductive plug positioned with in said body at each end thereof and spaced" from each other, said plugs engaging?- the E edges of the ends of said stri for clam in it a crust the inner face of salid body, (if said in having means for-connecting therewit 3 terminal of an electric socket, and the other of said lplug having means for connecting therewit means for clamping thereunder plug arranged therein at 5. A terminal fuse com rising a hollow cylindrical body of insulation, a conductive plug arranged therein at each end thereof and having edge contact with the inner face of said body, said plugs spaced from each other and each having a bore formed with a threaded wall for connecting a conducting element therewith, and a fusible conductor positioned within said body and havin its ends clamped between the outer edges 0 the plug and the inner face of said body.

'6.-A terminal fuse comprising a hollow cylindrical body of insulatlon, a conductive plug arranged therein at each end thereof and having edge contactwith the inner face of said body, said plugs s aced from each other and haying-means or connect- .ing conducting element's therewith, and" a fusible conductor positioned within said body and having its ends. clamped between the outer edgesof the face of said I '7. A terminal fuse comprising} hollow cylindrical body of insulatlo a du'ct'rve endthereof plugs and the inner and having edge contact with the inner face of said body, said plugs spaced from each other and havingmeans for connectin conducting elements therewith, and a usible conductor positionedwithin said body ,and'

having its ends clampedfbetween the outer In and the inner face of said body, sai plugsand the ends of said sn-ip flushed wit the ends of said body. Iii-testimony whereof, I afiix my signature hereto. 1 HOVEY B. STONEMAN. 

